Combination roller bit and disk structure



E. F. RAYMOND ER'BIT AND DISK STRUCTURE comsmuror-z ROLL Filed July 6. i925 INVENTOR. n

I a Ward F fiyymm lid/ 7% ATTORNEYS.

BY 77m ill ll EFFEEE;

[III III lll ll Patented Man-23, 1926. i

. I EDWARD F. RAYMOND, OF SANTA FE SPRINGS; CALIFORNIA.

COMBINATION noLLEn Brr AND :orsx srxwozroan;

Application, filed July 6, 1925. serial- No. 41,654,

To all whom it may concern.-

- j .Bc i't'known that I, Enwnnn F. Rarnoxn,

a citizen of the United States, and resident of Santa Fe Springs, in the eountybt Los Angeles. State of'California, have invented new and useful Improvements -in a (Zombination Roller B'itand Disk Structure, of

. which this is a specification.

' ing the cutter bearings. In drilling wells,

This invention relates to a rotary boring 'tool employing rotatable cutters, and pertains particularly to the meansfor lubricaterated bypressure of the circulation liquid.

Insuch cases, the feed of the lubricant begins when lowering of the tool is begun,

I and there is a wastage of lubricant. Furthermore, the time that the tool may be operated while it is cutting" into the formation is substantially decreased. The primary object of this invention is to provide lubricating means of the'character described which will not begin feeding lubricant until rotation of the tool isbegun and which will continuously feed lubricant thereafter. 'An

other object of this invention is to providea tool having cutter surfaces and the wash so arranged as to clean thecutters by, washing the cuttings lodged thereon outwardly.

In addition to the broader objects of this invention, there are certain details of design whereby a strong, durable, ethcient and positively operated structure obtained.

These objects together with other objects and corresponding accomplishments .are

obtained by means of the embodiment of my invention illustrated in the-accompanying drawing, in which:

Fig. 1 is an axial section through a roller bit; and Figs. 2, 2,v 4., and 5 are sections as seen on lines correspondingly. numbered in Fig. 1. y

Referring more particularlyto the draw ing., .6 indicates the stock or body of the I too'i 'havingat the upper end a box with a threaded internal taper as indicated by 7.

chamber portion 8 for the wash liquid '1s closed from communicationavith a barrel 9 by means of a plug 10. The bore 9 extends close to the bottom of the tool, and the upper'end thereof is in communicationwiththe exterior through a passage 11.

The body of the .tool endsin a leg 12 at the center and offset'outerlegs 13. Extend- 55 ing-through legs 13 and securedto leg '12 W are shafts or pintles 14:. A shaft Mhas rotatably mounted thereon a pair of roller cutters 15 and 16. Each shaft has an oil duct opening to-the surface thereof upon which the rollers are mounted and com municating with passages 17 which branch from a central passage 18 communicating with the bore 9, Achain or other flexible member 19 is secured to a plug 10,- the other end of the chain being secured to a piston 20 which 'floats in the bore. It is obvious-that, if'the port 18 is open, chamber 9; filled withlubricant. and the piston in I the position shown, circulation fluid on its return will enter the passage 11 and act upon the top of piston 20 forcing the latter and lubricant dmvnwardly through fthe port 18 and to the bearing surfaces of the shafts. This vs 'ould occur immediately upon plaeinp the tool in the hole and starting: circulation, circulation commonly being maintained while the tool isbeing lowered. As it is not desirable to start lubrication until the tool is started in operation to cut, 9

means is provided to close the port until rotation is started.

This Ineans comprises a. gate 21 slidably' mounted in a .way within the tool so that the gate may be projected across the port 18 to close the latter. Back of the gate is a spring 22 tending to torcethe gate outwardly. The gate has a rack upon one side thereof meshing with a pinion 23 journalled in the body, it in turn meshing with a pinion 24 mounted upon a roller 25. The roller is journalled in a recess in the side of-the tool so that it projects beyond the periphery thereof a distance such that it will engage 105 the sides of the hole, and by rotation of the roller a consequent rotation of the pinion will be caused. Rotation in a right. hand direction will cause the gate 21 to be moved outwardly and eventually the'pinion teeth will ride over the end of the teeth on the raclc Thereupon, the spring 22 forces the gate into its outermost position so that crs 1.5 and 161 It will be noted. that the.

' in said body and it will. not be operated by the pinion. A plug 26 closes the gate channel and provides access thereto for resetting the gate.

Water conrs'es 27 extend downwardly through the body and divide at the lower end directing the Wash liquid ovcrihe rollroliers have'be'velled edges with transverse corrugations and rounded outer side" faces with annular corrugations.

In, the operation of -'h'o tool, ping and .piston are removed and gate 21 closed. The barrel 9 is then filled vwith lubricant. Piston 20 isreplaced and-plug 10. inserted in position, The tool is now P ready for operation. Lubricant cannot be discharged from the ehalnberunless gateQL is opened. During the. time that the tool is lowered in the hole, the gate is maintained closed. Upon startingthe tool rotating at the bottom of the hole, roller 25 engages the side wall ot 'the hole-and turns to, retract gate 21. After the gate has been removed so that the teeth on the rack and pinion are out of mesh, spring 2-2 moves the gate into position such thatit is' disconnected from the pinion and roller 20. The pressure of the the out-side of the tool acts upon piston 20 and forces the latter downwardly in the barrel ejecting lubricant through port 18 and passages 7 bearing: surfaces.

\Vhat I claim is: I I l A. hydraulicrotary boring tool coin} prising a body havin rotatable cutters, there being an expansib e lubricant chamber lubricant ducts leading therefrom to the bearings of the cutters, and lubricant control means for preventing the flow of lubricant from said chamber and operable by rotation of said tool to permit the flow of lubricanttherefrom.

'2. A hydraulic rotary borzug tool con1- prising a body hawing rotatable cutters,

vber and lubricant ducts leading therefrom sure .jthe cireulationiiliquid, valve means preventing the flow 0t lubricant through an expansible lubricant circulation fluid. uponfecding it to the pintle space.

there being; an expdnsiblc lubricant chain said ducts, and means operable by rotation (if said tool to open said valve 1 I 3. A rotary boring tool comprising. a body having rotatable cutters, there being "chamber 'in said body and lubricant ducts' -leading therefrom to" the bearings of the. cutters, lubricant control means for controlling the flow of lubricant from said chamber, and,a roller' disposed at the periphery oi said body operable by the rotation of-the tool to initiate l. A rotary boring tool'comprising a body having rotatable cutters, there being an ex ansiblc lubricant chamber and lubricant ducts leading therefrom to the bearings of the cutters, means for forcing lubricant from said chamber operable by the pres .sure of the circulation liquid, valve means for preventing the flow of lubricant through said. ducts. and a roller riphery of said body operable by rotation of the tool'to open said valve and initiate the flow ot' saidlubricant. I 5. A hydraulic rotaryboring tool specified in claim 2 characterized by said valve means comprising a islidable cage with a rack formed thereon apinion 111 mesh with sa d rack, and gearing connect:

in said barrel, said barrel being in open conin'i'unication with the circulation fluid. valve means for preventing the flow of lubricant through said ductsQ-a roller dis posed at the periphery of said body oper-' able by the rotation of said tool to open said valve means and initiate the lion of V the lubricant characterized by said-valve means comprising aslidable gate with a rack formed thereon, a pinion in mesh with said raclg'and gears connecting saubpinion to said roller. I

In Witness that I claim the foregoing l have hereunto subscribed my name this 26th. day of June, 19:25.

EDWARD F. RAYMOND.

flow of the lubricant.

d-isposed at the petoo 

